From Loch Muick can do the 101 route - it's 22K and ~4h, or some sort of traverse over Lochnagar - perhaps we could do Lochnagar, Carn a' Choire Bhoidheach and White Mounth, then back down by path by Dubh Loch, the whole skyline traverse would take a while longer. Or anyone for a short run could go round the Loch?